Door-operating system



Nov. 26, 1929. H.' ROWNTRE lJOR OPERATING SYSTEM Filed June 16, 1926 :5 sheets-sheet A1 a hn .m @nu R EF 0 Vla W.. md f n 5mn@ #@Oh uw., G w\ n l l t l VNOV. 26, H ROWNTREE I I DooR OPERATING SYSTEM v Filed June 1.6,k 1926 v, 3 Sheets-Sheet f2 INVENTOR` /J /T' ATT NOVfZG, 1929. H, RQWNTREE L' DOOR OPERATING SYSTEMv v Filed June 16, 19'26 3 SheStS-Sheeb 3 INVENTOR Y @fd/4 wf? ree BY Y his .ATTORNEYS pressure by the Patenten Nev. 2e, 19235 um'rso srnras PATENT OFFICE HAROLD RowNTREE, OE scARsDALE, NEW YORK,A AssIGNoR To NATIONAL PNEU` .Marre COMPANY, OE NEW YORK, N. YEA' CORPORATION or WEST VIRGINIA.

DOOR-ORERATING srsfsTEN4 Appncation mea :une 1e, 192e. serial No. 116,489.

provision of a novel door operating engine by means of-r which Sliding doorsgon vehicles maggie operated. v. other object of this invention is the provision of a single, differential Huid pressure operating engine by means of which the doors of a vehicle are maintained closed when pressure is admitted to the large face of thev piston'. Another object of the invention is to secure by the release of the pressure on the large face of "the piston. v

- A further object of this invention `is a provision of asystem of this type by meansv of which va valve is provided for releasing this assengers themselves.

' lt is also an o ject of the invention to so arrange the systemthat the passenger controlled valves are connectedto the system at the will of the car attendant.

A still further object of this invention is the provision of a form of differential engine so constructed that double sliding 'doors may be moved in Opposite directions by means of a piston rod moving in one direction. A further object of this system is a provision of means whereby it may be readily adapted for operation of the doors by the car attendant only' when desired.

Another Obj ect of the invention is the pro-` vision of a system` of the type having the advantages .mentioned above whichI may be readily applied to a number of cars comprising. a traln so that as many doors as desired may be placed either under the control of the passengers or under the control of the can l attlndant, or partially underthe control ofv l50 bot l i means of this construction, .'a door operatlng system which mayl be controlled by A further object ofthis invention is the tem; and

These and many otherobjects are secured by means of the invention described below.

This invention resides substantially in the construction, combination, arrangement an relative location of parts as will be clearly described in the following specification taken in connection with the drawings.

Referringto the drawings; Y Figure l is a top plan View with ,some parts broken away of the fluid pressure operated engine; l l

Fig. 2 is a vertical cross sectional .view of the engine of Fi 1;

Fig. 3 is a top pFan view showing the application of the engine to a vehicle having double sliding doors;

Fig. 4 is a sideelevational view of Athe structure of Fig. 3; i

Fig. 5 1s a'nenlarged cross sectional view of a'vehlcle to which this invention has been applied;

Fig. 6 is a diagrammatic view 'of the uid pressure circuit and the control means connected therein for controlling two engines Fig. 7 is a cross sectional View of the restricted air passagejdevice; Fig. 8 is a cross sectional view of the passenlger operated valve and the three way coc v Fig. 9 is a cross sectional viewof the three way cock showing the valve rotated I through 90.

Fig. 10. is La cross sectional view of one y end of the engine;

Fig. ll'is a diagrammatic view of a modified form of valve adapted-for use `in the'sys- Fig. l2 isv another view of the same valve shown in its rotated position.

Referrin `now to Figs. 1 and 2, the door engine is s own comprising the outer cylinder -1 having the end caps 2 and 3. Inl

the end cap 2 is ,provided the passage@ connecting with-athre'aded outletmthe'eapf .i

shown in the dotted lines. Slida'bl piston rod. 5"A having thereon, wo-:faced piston 75which is provided' with Vthe cup washer-...28.-q'fs1idab1y mounted in the ist@ a eadlis'theplungerfrod liaving the Ongi-jy cap 12 at one end and has its other end pressto force the piston tothe right an equaling against the head on the plunger 6 so as to urge it to the left (Fig. 2). The hollow piston rod is intended to slide through the cap 13 secured to the cap `member 3 and a washer 14 is provided to prevent leakage at this point. Two parallel spaced rods 16 are bolted to thecap member 3 and the ca 13 and serve to clamp them together. T ese rods extend through, bores in the member 15 and terminate 1n the support v17 upon which is mountedV the stop bolt'18 by means of which' the length of the piston stroke may be adjusted. It will be noted that the member 15`has the integral projection 19 mounted thereon for a purpose to be shown hereinafter and projecting from its other end is the plate like projection 2O which has a purpose tobe later described. A small hole 21 extends through the cylinder Wall Y1 into a small enclosed space 21 which is connected to the passa es 22 and 23 formed in the cap member 3. t is intended that fluid pressure 'will always be applied to the small face `8 of the piston and when it is desired fluid pressure will beA applied to the large face 8 of the piston to force itto the right (Fig. 2). This result issecured by reason of the'difference in area of the ltwo faces 8 and 8". When the piston is at the extreme right of its movement it will lie between the small ports 21 and 23. It is in this position .that the doors are closed.-

Should for any reason fluid leak from the left end Aof the cylinder, the doors would tend to o n, but since the space on the right of the plston is in communication with the space at the left of the piston, a balancing of pressurewill be secured through the port 21, space 21', passage 22 and passage 23.

lReferrin now to Figs. 3 and 4 an endless chain is s own mounted on the rotatable sprockets 21. and 22 which chain is secured to the head 15 by means of the plate like projection 20. The chain is also secured b means of the attaching member 27 to door 24 so that any movement of the chain will be cylinder.` When pressure is released :from

the left hand end of the cylinder the ressure inthe right hand end of the c lin er will force the piston to the left. yThis will draw the upper side of the chain (Fig. 3) to the In Fig. 5 the car frame is shown at B and the door 24 is shown mounted on the rollers 30 operating in the ball race track 31. The

door is shown secured tothe chain 21 by the plate 27. The whole structure is enclosed within a tprotecting casing C.

One ro the possible forms of the system adapted for use with my novel engine, is disclosed in Fig. 6. The ipe marked Feed is connected through t e pipe 38 the restricted passage device 39 and the short pipe 41 to the space communicating with the small face of the piston. The feed pipe is also connected by means of the pipe 37 to the valve 42 and thence through a groove in the valve head to the pipe 33. when the valve is in the position shown in the ligure. This pipe is connected to thespace in which the large face of the piston operates through the restricted air passage 4() and the short pipe 32. A pipe 34 connects with the valve 42 and has connected therein, the three wayvalve 35. A

Apassenger door opening valve 36`is connected to the other end of the three wa valve. An exactly similar arrangement is s own for the engine 1* to which is. connected the valve 43 which is ofconstruction similar to the valve 42. The valve stems of these valves are cony nected together by the link 44 and are adaptedto be operated in unison by means of the valve tion of the magnet valve andvalve puller will be given here since their construction and operation are very well known in the art.

Before describing the operation of this sysj vice 40 which comprises the two speed plugs 40 and 401 and the ball check valve 40. Y Whenfiuid pressure is admitted through pipe i 33, the ball will rise and air will be admitted to the pipe 32. through both of the speed plugs 40a and 40. and to the engine but when the fluid is being exhausted from the engine, the

ball will seat so that iiuid can escape to the pipe 33 only through the speed plug 40". By .A n

use of this device relatively rapid admission of fluid to the engine is obtained but its exhaust. therefrom will bel somewhat slower since the exhaust passage through the plug .tem attention is directed to Figs. 7 to `10. In

Fig. 7 is shown the restricted air passage de 40a is smaller. It is, of course, evident that by varying the sizes 'of the openings in the speed plugs, any desired relative speeds of ynected together, was to make it clear that it is operatlon may be secured.

Y The passenger door opening valve 36 comconnect together as many of these door enprises a body within which is mounted the gines as is desired. It is also intended that valve 36b which is normall maintained on its one valve may be used to control all the doors,

seat by means of the s rlng 36. A handle or one valve for each door, or any other dewithin the contemplation of this invention to for raising the valve o its seat is shown exsired arrangement which will readily sugtending through thewall ofthe valve at' 36d. gest themselves to those skilled in the art. The three way cock 35 -is shown with the ex- Should it become desirable to have the haust port 35b extending vthrough the wall doors entirely under the control of the car thereof so that when the valve is in the posiattendant, it merely becomes necessary to ro'- tion shown in Fig. 9 the ipe 34 will be opened tate thethree way valve into its position as to exhaust. In Fig.. 10 1s shown an enlarged shown in Fig. 9 so that, upon the operation of 6 is as follows:

view of the cap 2 and the pipe 32 communicatthe Valve 42 through the agency of the magnet ing with the cylinder 1. valve 47 and valve puller 46 to a position so as The operation of the system shown in Fig. to connect the' pipe 33 with the pipe 34 the Fluid ressure is admitted fluid is exhausted from the leftv hand end of through the pipe marked) Feed, pipe 38, rethe engine through the exhaust port 35b ofthe stricted air passage device 39 and through three way valve. rlhis in efect merely cuts pipe 41 to the small face of the piston. It the passenger door opening valve out o cir- Will be seen 'that fluid pressure is always cuit. n lconnection with the opening of the maintained at this end of the cylinder. Addoors in order that at the last part of their then extended from the cylinder, and the portion of its stroke.

mission of Huid pressure to the other end is movement they will not slam, the spring controlled by means of the valve 42 and is adpressed plunger 6, (Fig. 2) is provided so mitted thereto when the valve is in the pothat the piston will move to the left' against sition shown in the ligure. The piston. 5 is the action of the spring 10 during the last doors are closed. When the vehicle comes Manifestly if desired there could be an to a stop, the car attendant, either the motorelectrlc valve and a valve puller for each conman or the conductor, closes an electric cir-. trol valve but a more economical installation cuit to the magnet valve 47 which operates can be made by only using one magnet valve to admit fluid pressure to the valve puller and one valve puller for all the doors on one 46 to move the valve 42 so'thatvpipe 33 is side of each car. Manifestly also, the conconnected through the valve to the pipe 34. trolling valves for the engines on one side of In this arrangement the three way valve 35 the car could also bebuilt into one large valve will be in position shown in Fig. 8. `The opsuch as Shown in Figs. 11 and 12 which is eration of the doors is then ,under the control adapted to operate three engines. Fluid pres-- of the passengers who, by depressing the sure is admitted through the pipe 60 to each 'valve stem 36d, open the pipe line leading ofthe ports 60. In the position ofthe valve from the left end'of the' cylinder 1 to the atas shown in Fig. 11, the large end of the cylinmosphere. The air is then slowly exhausted ders of the three engines would be connected from this end of the cylinder through the throughjhespipes, 62, 6 4 and 66 to the exspeed plug 40",l and through the` pipe v2 LS -de-'= fha'st lines, 61, 63 and 65 respectively through scribed via the exhaustl portf36". "The doors the grooves 51, 53 and 52 in the valve head. are then slid in'opposite directions as has When the valve is rotated to the position been described in connection with Figs. 3 and shown in Fig. 12, the pipes 61, 63 and 65 are 4. The speed with which the doors open de'- disconnected from the engines and the pipes pends upon the size of the passage inthe speed 62, 64 and A66 are Connected through the plug 40a. It is intended to supply the passengrooves 51, 53 and 52 to the ports 60 which ger valves 36 at each of the doors, both on are connected by passages notshown to the v l the inside and on the outside of the car so that fluid pressure feed line 60. Fluid pressure passengers may Aeither b'oard or depart from would thenbe fed-to the large ends of the the car. When a'complete change of passenengines to force the doors closed. It will vvalve 42 to its position shown in the iigure. or manuallycontrolled.

gers has been completed, the car attendantwill be evident that this valve may be electromag- Qperate the magnet valve 47 so as. to return netically controlled, pneumatically controlled Fluid is then admitted to the large end'of the It will bev evident from the foregoing decylinder to close'the doors. It is evident`scription that the invention disclosed withfrom Fig. 8, that the valve 36h recedes of itself in has many novel and valuble features and upon release of pressure upon its handle 36d. it is desired not to be strictly limited to the An exactly similar operation takes place with form of invention disclosed by the way or" the system connected with the engine marked illustration since many changes in details of 1EL and the valve 43 and it is not thought necesconstruction and arrangement of parts will sary to describe its operation in detail. The no doubt occur to those skilled .in this art.

main purpose of showing the two systemscon- It is therefore intended to be limited -to the magnetically operated means under the consco ve of the inventionas defined inthe claims. hat I seek to secure by United States Letters Patent'is:

1. In a door operating system for passenger vehicles in combination With-a two part door comprising two sections mounted to slide in opposite directions in. the same lane of a single power device connected to oth parts of said door. for sliding them and a hand operated control device connected to said power device to'be operated by a passenger to operate said door.

2. In a door operating system for 'pas-'v senger vehicles in combination with a two part door comprising two sections mounted to Vslide in opposite directions in the same plane,

of a differential fluid pressure operated eni' gine connected to both partsof said door,

said engine being connected so as to normally vmaintain the door closed and a hand operated passenger control valve for exhaustlng fluid pressure from said engine to cause it to open said dooi` when operated by a passenger.

3. In a system for operating a plurality of doors the combination with double sliding` doors of a single differential fluid pressure operated engineVJ adapted to normally maintain the doors closed, means under manual control for opening said doors and electrotrol ofa train attendant for connecting said manual means to sald engine.

4. In a system for operating a plurality of doors 'the combination with double sliding doors of adifferential fluid pressure engine having a piston ywith faces of unequal areas for sliding the doors in opposite direction, valves at said doors for actuating said engine and means controlled by a Ctrain attendant for 4putting said valves in control of said engine, said fluid pressure operated um'eans being provided 4with means for preventing` the doors from opening should fluid pressure leak from behinld the large'piston .5. In a system for o eratingaplurality of.

doors on passenger-vendes the-combination with double 'sliding doors of a single differential fluid pressure operated engine having a piston with faces of unequal areas adapted to normally maintain the doors closed and manual means Linder the control of the passengers for opening said doors,

said fluid pressure operated means being provided 4 with means for preventing the doors from opening should fluid fpressure leak from behind the large piston ace.l

` 6. In ay system for operating a plurality of doors onpassenger vehicles the combination with double sliding doors of a 'single differential fluid pressure operated engine having a piston with facesof unequal areas 'adaptedto normally maintain the doors closed and manual means' under the control of the passengers for opening said doors and electro-magnetically operated means under the control of a train attendant `for connecting said manual means to said engine, said fluid pressure operated means being provided with means for preventing the doors from opening should fluid pressure leak from belnnd the large piston face. l

7. In a system for operating aplurality of doois the combination with ldouble sliding doors of means'for operating said doors,

valve means/for controlling said means and independent' means for putting said controlling means in operative relztion with said door operating means and means for preventing too rapid operation of the doors.

y .8. In a system for operatinga plurality of doors in combination with double sliding doors of means for operating said doors,

means for controllingsaid'means and independent means for putting said controlling means in operative relation with said Idoor operating means and a spring pressed plunger slidably mounted fin' the piston of said operating the piston.

9. In a 'system for operating a plurality of doors the combination with double vsliding doors of means 'for operating said doors,

, means for controlling said means and independent and electromagnetically controlled means for putting said controlling means in operative-relation with said door operating means.

l0. In a system for operating a plurality of doors the combination with double sliding means to cushion the movement of doors of a fluid pressure operated vengine foroperating the doors, passenger valves for openmg said doors and electromagnetically operatedvalves for putting said passenger vlaves in control of said engine said electro-l magnetically operated valves being adapted to close said doors when attendant.

11. In a system for operating a plurality.'

of doors the combination with double sliding doors of a fluid pressure operated engine for operating the doors, passenger valves for opening said doors, electromagneticallyv operated valves for putting said passenger valves operated by a train in control of said engine, said electromag--y vnetically operated valves being adapted to close said doors when yoperated by a train rapidoperation of. theA doors and means for placing said independent means in complete control ofthe operation of the doors.

' 13. The combination with a plurality of Y sliding doors of balanced means for operating sald doors, said means being connected` to one of said doors by an endless chain and to the other by a rod to cause them to slide in opposite directions.

engine havinga crosshead of a plurality of sliding doors, an endless chain operated by the .crosshead for moving one door, and a direct connection between said crosshead and the other 'door to cause it to slide in a direction opposite to the other door.

15. The combination with a fluid pressure engine of a'door composed of sections, and connections between the engine and each of said sections; ysaid connections being so arranged that the forces exerted by the engine are balanced of the engine.

16. The combination with a fluid pressure' engine having a crosshead of a 'door composed of sections, an endless chain attached to one side of the crosshead and attached to one of my hand on this 14th said door sections, and a direct connection between the other side of the crosshead an'd the other of said door sections.

In testimony whereof I have hereunto set day of June, A. D. 1926. HAROLD ROWNTREE.

The combination with a fluid pressure in 1in@` with the 1in@ of mqtion 

